﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai_8_C_sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            Rectangle recta=new Rectangle(3,4);
            Rectangle rectb = new Rectangle(5, 6);
            recta = rectb;
            Console.WriteLine("recta:{0}", recta.area());
            Console.WriteLine("rectb:{0}", rectb.area());
        }
    }
}
